[S] Change in coreboot[master]: mb/system76/adl-p: Add CPU PCIe RP RTD3 configs

[Tim Crawford (Code Review)]

Tim Crawford has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/71661 )

Change subject: mb/system76/adl-p: Add CPU PCIe RP RTD3 configs
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mb/system76/adl-p: Add CPU PCIe RP RTD3 configs

Tested with the following drives:

- Crucial P5 Plus (CT500P5PSSD8)
- Kingston KC3000 (SKC3000S/512G)
- Sabrent Rocket NVMe 4.0 (SB-ROCKET-NVMEe4-500)
- Samsung 970 EVO (MZ-V7E250)
- Samsung 970 EVO Plus (MZ-V7S250)
- Samsung 980 PRO (MZ-V8P2T0)
- WD Black SN850X (WDS100T2XD0E)
- WD Blue SN580 (WDS500G2B0C)
- WD Green SN350 (WDS240G2G0C)

Test:

- System still asserts `SLP_S0#` during suspend (power LED blinks)
- `slp_s0_residency_usec` still increases after suspend

Change-Id: I919d75cb2a88c0d623c46e44c506ec2d85567995
Signed-off-by: Tim Crawford 
---
M src/mainboard/system76/adl-p/variants/darp8/overridetree.cb
M src/mainboard/system76/adl-p/variants/galp6/overridetree.cb
2 files changed, 39 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/71661/1

diff --git a/src/mainboard/system76/adl-p/variants/darp8/overridetree.cb b/src/mainboard/system76/adl-p/variants/darp8/overridetree.cb
index 4a554ad..4caed3a 100644
--- a/src/mainboard/system76/adl-p/variants/darp8/overridetree.cb
+++ b/src/mainboard/system76/adl-p/variants/darp8/overridetree.cb
@@ -22,6 +22,12 @@
    			.clk_req = 0,
    			.flags = PCIE_RP_LTR,
    		}"
+			chip soc/intel/common/block/pcie/rtd3
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D14)" # SSD2_PWR_EN
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_F20)" # M2_CPU_SSD2_RST#
+				register "srcclk_pin" = "0" # SSD2_CLKREQ#
+				device generic 0 on end
+			end
    	end
    	device ref tcss_xhci on
    		register "tcss_ports[0]" = "TCSS_PORT_DEFAULT(OC_SKIP)"
diff --git a/src/mainboard/system76/adl-p/variants/galp6/overridetree.cb b/src/mainboard/system76/adl-p/variants/galp6/overridetree.cb
index fc93fdc..e63e185 100644
--- a/src/mainboard/system76/adl-p/variants/galp6/overridetree.cb
+++ b/src/mainboard/system76/adl-p/variants/galp6/overridetree.cb
@@ -20,6 +20,12 @@
    			.clk_req = 0,
    			.flags = PCIE_RP_LTR,
    		}"
+			chip soc/intel/common/block/pcie/rtd3
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D14)" # SSD1_PWR_EN
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_F20)" # M2_SSD1_RST#
+				register "srcclk_pin" = "0" # SSD1_CLKREQ#
+				device generic 0 on end
+			end
    	end
    	device ref tcss_xhci on
    		register "tcss_ports[0]" = "TCSS_PORT_DEFAULT(OC_SKIP)"